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- 3 - <br />1 <br />1 <br /> <br /> <br />1 <br /> <br />1 <br /> <br /> <br /> <br /> <br /> <br />previous report), A-6, A-7, and A-8. All six borings were.. <br />advanced by augering in soils and by coring in rock. Their <br />locations are indicated on Plate 1, Site Plan. Borings E-1 <br />to E-3 are located on the center lines of individual mine <br />entries; borings A-6 to A-8 are located along the alignment <br />of the access road. <br />Logs of the borings are presented in the Appendix A of <br />this report. <br />2. Installation of piezometers in all these holes; stand- <br />pipe, open-type piezometers were used in all installations. <br />In addition, ten more piezometer (1-A, 1-B, 2-A, 2-B, 3-A, <br />3-C, 4-A, 4-B, 5-A, 5-B) were installed along the center <br />line of five proposed mine entries, in the portal-adjoining <br />sections. The location of the piezometers is shown on Plate 1, <br />Site Plan; description of their installation, the depths and <br />ground water conditions are presented in the Appendix A. <br />3. Point load testing of selected rock types on cores ob- <br />tained from all rock borings drilled within this investigation <br />and on some selected cores from ARCO's exploration borings. The <br />purpose of point load testing is to obtain approximate nu- <br />merical values of the unconfined compressive strength of the <br />rock. The results are presented in Appendix A. <br />4. Laboratory testing of selected soil samples to classify <br />the soils and to obtain suitable input parameters for the analy- <br />ses. The testing results are presented in Appendix A. <br />5. Stability analyses of selected slopes and structure; <br />ao«raa co'wm.q Nc <br />